Finding the Fourth Proportional to 3,947.42, 5,912.13 and 3,385.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.42 : 5,912.13 = 3,385.82 : x
2. Step 2: Convert to fraction form
   3,947.42/5,912.13 = 3,385.82/x
3. Step 3: Cross multiply
   3,947.42x = 5,912.13 × 3,385.82
4. Step 4: Simplify right side
   3,947.42x = 20,017,408.00
5. Step 5: Solve for x
   x = 20,017,408.00/3,947.42
6. Step 6: Final answer
   x = 5,071.01